Vertical windtunnel



FIG. 1 is a top perspective view of a vertical windtunnel;

FIG. 2 is a top plan view of the vertical windtunnel shown in FIG. 1;

FIG. 3 is a bottom plan view of the vertical windtunnel shown in FIG. 1;

FIG. 4 is a front view of the vertical windtunnel shown in FIG. 1;

FIG. 5 is a rear view of the vertical windtunnel shown in FIG. 1;

FIG. 6 is a right side view of the vertical windtunnel shown in FIG. 1; and,

FIG. 7 is a left side view of the vertical windtunnel shown in FIG. 1. 

The ornamental design for a vertical windtunnel, as shown and described. 